/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkListSample_hxx
#define itkListSample_hxx


namespace itk
{
namespace Statistics
{
template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::Resize(InstanceIdentifier newsize)
{
  this->m_InternalContainer.resize(newsize);
}

template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::Clear()
{
  this->m_InternalContainer.clear();
}

template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::PushBack(const MeasurementVectorType & mv)
{
  if (this->GetMeasurementVectorSize() != NumericTraits<MeasurementVectorType>::GetLength(mv))
  {
    itkExceptionMacro("MeasurementVectorSize: " << this->GetMeasurementVectorSize()
                                                << " doesn't match input measurement vector length: "
                                                << NumericTraits<MeasurementVectorType>::GetLength(mv));
  }
  this->m_InternalContainer.push_back(mv);
}

template <typename TMeasurementVector>
auto
ListSample<TMeasurementVector>::Size() const -> InstanceIdentifier
{
  return static_cast<InstanceIdentifier>(this->m_InternalContainer.size());
}

template <typename TMeasurementVector>
auto
ListSample<TMeasurementVector>::GetTotalFrequency() const -> TotalAbsoluteFrequencyType
{
  // Since the entries are unique, the total
  // frequency is equal to the number of entries.
  return this->Size();
}

template <typename TMeasurementVector>
auto
ListSample<TMeasurementVector>::GetMeasurementVector(InstanceIdentifier instanceId) const
  -> const MeasurementVectorType &
{
  if (instanceId < m_InternalContainer.size())
  {
    return m_InternalContainer[instanceId];
  }
  itkExceptionMacro("MeasurementVector " << instanceId << " does not exist");
}

template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::SetMeasurement(InstanceIdentifier      instanceId,
                                               unsigned int            dim,
                                               const MeasurementType & value)
{
  if (instanceId < m_InternalContainer.size())
  {
    m_InternalContainer[instanceId][dim] = value;
  }
}

template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::SetMeasurementVector(InstanceIdentifier instanceId, const MeasurementVectorType & mv)
{
  if (instanceId < m_InternalContainer.size())
  {
    m_InternalContainer[instanceId] = mv;
  }
}

template <typename TMeasurementVector>
auto
ListSample<TMeasurementVector>::GetFrequency(InstanceIdentifier instanceId) const -> AbsoluteFrequencyType
{
  if (instanceId < m_InternalContainer.size())
  {
    return 1;
  }
  else
  {
    return 0;
  }
}

template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::Graft(const DataObject * thatObject)
{
  this->Superclass::Graft(thatObject);

  const auto * thatConst = dynamic_cast<const Self *>(thatObject);
  if (thatConst)
  {
    auto * that = const_cast<Self *>(thatConst);
    this->m_InternalContainer = that->m_InternalContainer;
  }
}

template <typename TMeasurementVector>
void
ListSample<TMeasurementVector>::PrintSelf(std::ostream & os, Indent indent) const
{
  Superclass::PrintSelf(os, indent);

  os << indent << "Internal Data Container: " << &m_InternalContainer << std::endl;
  os << indent << "Number of samples: " << this->m_InternalContainer.size() << std::endl;
}
} // end of namespace Statistics
} // end of namespace itk

#endif
